Highly enhanced and stable activity of defect-induced titania nanoparticles for solar light-driven CO 2 reduction into CH 4

Sorcar, Saurav; Hwang, Yunju; Grimes, Craig A.; In, Su‐Il

doi:10.1016/j.mattod.2017.09.005

Cited by 130 publications

(85 citation statements)

References 53 publications

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“…Literature suggests variety of reaction conditions and set-ups for photocatalytic CO 2 reduction. Of these conditions, two type of reaction modes are extensively applied in photocatalytic CO 2 reduction: (i) flow reaction system and (ii) batch reaction system [5,[9][10][11][12]. However, the largely reported use of batch reactors obtains smaller yields of the photocatalytic products.…”

Section: Flow Versus Batch Reactorsmentioning

confidence: 99%

“…On the contrary, evaluating the performance of the photocatalyst in terms of AQY, which incorporates reactor area, incident and harvested light, can be a more adequate approach [59]. For meaningful performance comparison, AQYs of the different photocatalysts are calculated and presented in Tables 1-3, using Equations (4)-(8) [11,59].…”

Section: Benchmarking For Performance Evaluationmentioning

confidence: 99%

“…Another decisive factor is the exposed area of the photocatalyst to interact with the light irradiations. Even for the different types of photocatalysts, when tested under similar conditions and with yields reported per gram of photocatalyst, a comparison can be misleading because the exposure area, per gram of the photocatalyst, to light will be different for powder catalysts and thin films [10,11]. Moreover, irrespective of photoreaction under standard conditions, yields have been reported in different customary units i.e., ppm cm −2 h −1 , µmol g −1 h −1 and µmol cm −2 h −1 which further complicates the comparison [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

et al. 2019

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Photocatalytic CO2 reduction is emerging as an affordable route for abating its ever increasing concentration. For commercial scale applications, many constraints are still required to be addressed. A variety of research areas are explored, such as development of photocatalysts and photoreactors, reaction parameters and conditions, to resolve these bottlenecks. In general, the photocatalyst performance is mostly adjudged in terms of its ability to only produce hydrocarbon products, and other vital parameters such as light source, reaction parameters, and type of photoreactors used are not normally given appropriate attention. This makes a comprehensive comparison of photocatalytic performance quite unrealistic. Hence, probing the photocatalytic performance in terms of apparent quantum yield (AQY) with the consideration of certain process and experimental parameters is a more reasonable and prudent approach. The present brief review portrays the importance and impact of aforementioned parameters in the field of gas phase photocatalytic CO2 reduction.

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Section: Flow Versus Batch Reactorsmentioning

confidence: 99%

Section: Benchmarking For Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

et al. 2019

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“…[1][2][3][4][5] Photocatalytic CO 2 reduction into chemical fuels powered by [1][2][3][4][5] Photocatalytic CO 2 reduction into chemical fuels powered by …”

Section: Introductionmentioning

confidence: 99%

Graphdiyne: A New Photocatalytic CO₂ Reduction Cocatalyst

Meng

Zhu

et al. 2019

Adv Funct Materials

252

178

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Exploring new and efficient cocatalysts to boost photocatalytic CO 2 reduction is of critical importance for solar-to-fuel conversion. As an emerging carbon allotrope, graphdiyne (GDY) features 2D characteristics and unique carboncarbon bonds. Herein, a novel GDY cocatalyst coupled TiO 2 nanofibers for boosted photocatalytic CO 2 reduction, synthesized by an electrostatic selfassembly approach is reported. First-principle calculation and in situ X-ray photoelectron spectroscopy measurement reveal that the delocalized electrons in GDY can hybrid with the empty orbitals in TiO 2 within the TiO 2 /GDY network, leading to the formation of an internal electric field at the interfaces, pointing from GDY to TiO 2 . The theoretical simulation further implies strong chemisorption and deformation of CO 2 molecules upon GDY, which can be verified by in situ diffuse reflectance infrared Fourier transform spectroscopy. These effects, in combination with the photothermal effect of GDY, result in enhanced charge separation and directed electron transfer, enhanced CO 2 adsorption and activation as well as accelerated catalytic reactions over the TiO 2 /GDY heterostructure, thereby resulting in significantly improved CO 2 photoreduction efficiency and meanwhile with remarkable selectivity. This work demonstrates that GYD can function as a highly effective cocatalyst for solar energy harvesting and may be used in other catalysis processes.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201904256. solar irradiation is recognized as a potential solution to these issues. [6][7][8][9][10][11] As one of the most popular photocatalytic materials, TiO 2 is chemically stable, nontoxic and earth-abundant to be proverbially utilized for CO 2 photoreduction. [12][13][14][15][16] However, the photocatalytic efficiency of unitary TiO 2 is still far away from the practical requirements largely due to its rapid electron-hole recombination. [17][18][19][20] Modifying TiO 2 with a cocatalyst has been widely adopted to tackle this issue owing to the advantages of cocatalysts such as improving the selectivity, minimizing the overpotentials, promoting the charge separation, enhancing the adsorption of CO 2 , suppressing the photocorrosion and so on. [21,22] Up to now, various cocatalysts have been exploited to promote the photocatalytic performance of TiO 2 and the most widely used cocatalysts were noble metals, such as Pt, Pd, Au, Ag, and their alloys. [23][24][25][26][27][28] However, noble metals are scarce and expensive, hindering their prospect severely. Therefore, it is of significance to search for novel cocatalysts for TiO 2 -based photocatalyst to improve the photocatalytic CO 2 reduction performance.Carbon allotropes such as 0D carbon dot, 1D carbon nanotube and 2D graphene have attracted significant interests in many fields including catalysis, new device structures and solar energy harvesting. [29][30][31] Particularly, the discovery of graphene has raised a wave of new ...

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“…[3] Meanwhile, the competitive reactiono fp hotocatalytic hydrogen evolution also diminishes the generation of hydrocarbons, resultingi nl ow selectivity and activityo fC O 2 reduction of most currents ystems. To overcome kinetic limitations and suppress the hydrogen evolution reaction, numerous efforts have focusedo nt he improvement of pristine photocatalysts, by methods such as loading cocatalysts, [4] tailoring morphologies, [5] adjusting defectd ensities, [6] and constructing heterojunctions. [7] At the same time, the reaction interfacet hat governs the solid-liquid contact and mass transfer is also of vital importance to the photocatalytic CO 2 conversion process.…”

mentioning

confidence: 99%

Improving Artificial Photosynthesis over Carbon Nitride by Gas–Liquid–Solid Interface Management for Full Light‐Induced CO₂Reduction to C₁and C₂Fuels and O₂

et al. 2020

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The activity and selectivity of simple photocatalysts for CO2 reduction remain limited by the insufficient photophysics of the catalysts, as well as the low solubility and slow mass transport of gas molecules in/through aqueous solution. In this study, these limitations are overcome by constructing a triphasic photocatalytic system, in which polymeric carbon nitride (CN) is immobilized onto a hydrophobic substrate, and the photocatalytic reduction reaction occurs at a gas–liquid–solid (CO2–water–catalyst) triple interface. CN anchored onto the surface of a hydrophobic substrate exhibits an approximately 7.2‐fold enhancement in total CO2 conversion, with a rate of 415.50 μmol m−2 h−1 under simulated solar light irradiation. This value corresponds to an overall photosynthetic efficiency for full water–CO2 conversion of 0.33 %, which is very close to biological systems. A remarkable enhancement of direct C2 hydrocarbon production and a high CO2 conversion selectivity of 97.7 % are observed. Going from water oxidation to phosphate oxidation, the quantum yield is increased to 1.28 %.

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Highly enhanced and stable activity of defect-induced titania nanoparticles for solar light-driven CO 2 reduction into CH 4

Cited by 130 publications

References 53 publications

Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

Graphdiyne: A New Photocatalytic CO₂ Reduction Cocatalyst

Improving Artificial Photosynthesis over Carbon Nitride by Gas–Liquid–Solid Interface Management for Full Light‐Induced CO₂Reduction to C₁and C₂Fuels and O₂

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Highly enhanced and stable activity of defect-induced titania nanoparticles for solar light-driven CO 2 reduction into CH 4

Cited by 130 publications

References 53 publications

Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

Graphdiyne: A New Photocatalytic CO2 Reduction Cocatalyst

Improving Artificial Photosynthesis over Carbon Nitride by Gas–Liquid–Solid Interface Management for Full Light‐Induced CO2Reduction to C1and C2Fuels and O2

Contact Info

Product

Resources

About

Graphdiyne: A New Photocatalytic CO₂ Reduction Cocatalyst

Improving Artificial Photosynthesis over Carbon Nitride by Gas–Liquid–Solid Interface Management for Full Light‐Induced CO₂Reduction to C₁and C₂Fuels and O₂